Yosemite Safari won't let me delete/change passwords
I have upgraded to Yosemite. I found that I could not log into this site as the stored password/ID for this site that was restored from my time machine backup was old and needed to be corrected. I went into preferences on Safari and figured it would be a simple thing to just delete the old password and create a new entry the next time I logged in. Going to the preference page however, I find that I cannot delete this or any other password that has been stored. My guess is that there is some file where these are stored in and at the moment, for some bizzar reason, I don't have write permissions to this file. If knew where the specific file that stores this data is located I could just open up terminal and do a quick chmod on the permissions and I'm guessing that would fix things but I have no idea where this would be. I'm more than comfortable with Linux but I really don't mess around much in the bowels of OSX so if someone could kindly point me in the right direction it would be much appreciated.
MacBook Pro, OS X Yosemite (10.10)